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Finding the Fourth Proportional to 3.07, 4.23 and 2.87

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Solution

The fourth proportional to 3.07, 4.23 and 2.87 is: 3.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    3.07 : 4.23 = 2.87 : x
  2. Step 2: Convert to fraction form
    3.07/4.23 = 2.87/x
  3. Step 3: Cross multiply
    3.07x = 4.23 × 2.87
  4. Step 4: Simplify right side
    3.07x = 12.14
  5. Step 5: Solve for x
    x = 12.14/3.07
  6. Step 6: Final answer
    x = 3.95

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.